Supattra Aomumpai and  Chutima Prommak,  On the Impact of Reference Node Placement in Wireless Indoor Positioning Systems.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 1704 - 1708
    [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/9036.